75398381 has 2 divisors, whose sum is σ = 75398382. Its totient is φ = 75398380.

The previous prime is 75398363. The next prime is 75398431. The reversal of 75398381 is 18389357.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66748900 + 8649481 = 8170^2 + 2941^2 .

It is a cyclic number.

It is not a de Polignac number, because 75398381 - 2⁶ = 75398317 is a prime.

It is a super-2 number, since 2×75398381² = 11369831714842322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75398581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37699190 + 37699191.

It is an arithmetic number, because the mean of its divisors is an integer number (37699191).

Almost surely, 2^75398381 is an apocalyptic number.

It is an amenable number.

75398381 is a deficient number, since it is larger than the sum of its proper divisors (1).

75398381 is an equidigital number, since it uses as much as digits as its factorization.

75398381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 75398381 is about 8683.2241131967. The cubic root of 75398381 is about 422.4616979155.

The spelling of 75398381 in words is "seventy-five million, three hundred ninety-eight thousand, three hundred eighty-one".